Manufacturing method of composite blade with gradient function

Abstract

The invention relates to a manufacturing method of a composite blade with a gradient function, and relates to the relevant technical fields of mechanical cutting tool manufacturing and blade forming. A combined charging die is manufactured out through the 3D printing technology, and filling and packaging of a surface layer and a base body are achieved. Through one-step gradient sintering, by means of material transmission and element diffusion of components in different layers, an original powder blank two-layer structure of the blade can be changed to be a blade blank three-layer gradient structure, and the base body is completely wrapped by the surface layer of the blade. According to the microstructure characteristics, and a subsurface layer is formed by mutually diffusing the surface layer and the base body, has the high metal phase content, and achieves the effect of connecting the surface layer with the base body. According to the characteristics of mechanical properties of a tool, the surface is hard and resistant to wear, the subsurface layer is tough and resistant to stripping, and the base body has the high fraction resistance. The composite blade with the gradient function manufactured by the method is applicable to turning stainless steel, die steel and high-temperature alloy at a high speed, the machining efficiency is high, and the surface quality of the part is high.

Description

technical field [0001] The invention relates to the technical field related to mechanical processing, in particular to a method for manufacturing a gradient function blade. Background technique [0002] High-speed cutting technology is an advanced modern manufacturing technology, which has been widely used in manufacturing fields such as aerospace, automobiles and ships, and military weapons. Tool technology is one of the key technologies of high-speed cutting. At present, a large number of coated tools are used in industrial production, that is, a blade with a gradient functional change in mechanical properties and microstructure. This kind of blade generally deposits one or more layers of wear-resistant or heat-insulating material substances on a high-strength substrate by physical or chemical vapor deposition process, so that the surface of the blade has high hardness and good heat resistance, while the blade's Overall, it has good fracture resistance and impact resistan...

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Problems solved by technology

[0004] The above two patents are gradient functional composite tool materials, that is, the structure and performance of the tool material present a gradient change along a certain direction; the main point is that the tool material is not the blade, and the gradient of the mechanical properties and microstructure of the material that it can achieve The change is unidirectional (one-dimensional direction); if such a tool material is used to make a blade, it can only have a high-hardness surface layer on the rake face of the blade, and it is difficult to lay a high-hardness surface layer on the other blade faces

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